Instructions / Assembly

22
WARNING:
Do not attempt to drill the gas orifi ces. Use only
factory supplied orifi ces. Improperly drilled
orifi ces may cause fi re, explosion, carbon
monoxide poisoning, personal injury or death.
At 2,000 feet, the NFGC requires that this appliance be
derated 4% for each 1,000 feet of altitude. For example,
the input needs to be reduced 8% at 2,000 feet, 12% at
3,000 feet, etc. This furnace can be derated by reducing
the orifi ce size or decreasing the manifold pressure. When
decreasing the manifold pressure, the pressure must not
be set below 3.2 in. W.C.. NOTE: If the pressure needs
to be set below 3.2 in. W.C. to achieve the proper de-
rate, then change the orifi ce size and raise the manifold
pressure back to 3.5 in. W.C..
Operating Instructions for PO OIL Burners
Oil burners in PO series furnaces are factory equipped
with a primary control capable of either intermittent or
interrupted ignition.
Start-Up Procedure
1. Open all manual shut-off valves in the oil supply line
from the tank to the burner.
2. Turn ON the electrical supply to the furnace.
3. Set the room thermostat to the desired temperature.
Air-Bleed Procedure - Single Pipe Installation
1. Open the door to the furnace.
2. Attach 1/4” I.D. plastic tube over the end of the airbleed
valve on the oil pump as shown in Figure 15. Place
the other end of the tube in a large container.
3. Pull the door interlock switch out to start the burner.
4. Turn the airbleed valve open not more than 1/2 turn
to get a fast fl ow of oil into the container.
5. To assure continuous operation, use a wire to jump
terminals T-T on the primary control while burner is
running. If furnace is equipped with the Honeywell
R7184 or Beckett 7505 primary control, perform the
next 3 steps to prime the oil pump:
a. While the ignition is on, press the reset button for
1/2 second or less and release the reset button.
The lockout time will be extended to 4 minutes.
b. If prime is not established within the 4 minutes, the
control will lock out. Press the reset button to reset
the control and go back to step “a”.
c. Repeat steps “a” & “b”, if needed, until the pump is
fully primed.
6. When oil fl ow is clear of air bubbles, close air-bleed
valve and tighten. NOTE: Air bleed out time will vary
depending on length of oil line, number of bends, etc.
7. Remove the jumper wire on the primary control.
Figure 15. Oil Pump
4 GPH 100-15 0 PSI 3450 RPM
3 GPH 150-20 0 PSI 3450 RPM
VALVE ON DELAY
NO. 2 & LIGHTER FUEL
USE ONLY WITH
INLET
BY-PASS
Exclusively for Beckett
Made by Suntec
INLET
NO. 2 FUEL
A2EA-6520
Becket
t
Nozzle Port
3/16 Flare Fitting
Bypass Solenoid Valve
Cordset
Inlet Port
1/4 NPTF
Bleed & Gauge Port
Pressure Adjustment
Screw
Inlet Port
1/4 NPTF
Return Port - Install 1/6” Bypass Pipe
Plug for 2-pipe System Only.
(Use 5/32” Allen Wrench)
NOTE: If furnace is equipped with the Beckett 7505 primary
control, prime the oil pump using the following steps:
1. After the burner starts, press and hold the reset button
for 15 seconds until the yellow light turns on. This
indicates that the button has been held long enough.
2. Release the reset button. The yellow light will turn off
and the burner will start up again.
3. At burner start up, click the reset button while the
igniter is still on. NOTE: This will transition the control
to a dedicated pump prime mode, during which the
motor, igniter and valve are powered for 4 minutes.
The yellow light will be on. NOTE: If the prime is not
established during the 4 minute pump prime mode,
repeat step 3 until the pump is fully primed.
Oil Burner Shutdown Procedure
Set the room thermostat to “OFF” or its lowest setting.
Flame Adjustment
1. Set the thermostat below room temperature to start
the furnace.
2. Allow the furnace to operate for about 10 minutes.
3. Adjust the air shutter setting until 11% CO
2 with zero
smoke or less is achieved. NOTE: The draft over the
fi re must be at least negative 0.02 in. W.C. The factory
set air shutter settings are shown in Table 7 (page 21).
Electrode Setting
The electrode setting is carefully set at the factory. However,
during transit, the setting of the electrodes may become
improper. Before attempting to start the oil burner, check
the positioning of the electrodes to ensure that they are
properly positioned, as shown in Figure 16 (page 23).
Improperly adjusted electrodes can result in poor ignition.
Do not permit the electrodes to be closer than ¼” to any
grounded surface.
Switching from Interrupted to intermittent Ignition
Control
Honeywell and Beckett oil primary controls can be switched
between interrupted and intermittent ignition control. To
switch from interrupted duty (Factory set) to intermittent
duty, remove the blue ignitor wire from the quick-connect
terminal. Attach the burner motor and igniter wire to the